As told by Rafael Goldchain, Esther's son:

Esther Goldchain, nee Rubinsztajn, was born in Ostrowiec 1928.

She left Poland in 1938 to Venezuela with her mother Balbina Baumfeld. Her father Moises Rubinsztajn was already there having left Poland in 1932. The family moved to a Santiago, Chile in 1940.

Esther married Emilio Goldchain.  They moved to Mexico in 1972.  Esther passed away in Mexico City in December 2015.